"""!

@brief CCORE Wrapper for BSAS algorithm.

@authors Andrei Novikov (pyclustering@yandex.ru)
@date 2014-2020
@copyright BSD-3-Clause

"""


from ctypes import c_double, c_size_t, POINTER

from pyclustering.core.wrapper import ccore_library
from pyclustering.core.pyclustering_package import pyclustering_package, package_extractor, package_builder


def bsas(sample, amount, threshold, metric_pointer):
    pointer_data = package_builder(sample, c_double).create()

    ccore = ccore_library.get()

    ccore.bsas_algorithm.restype = POINTER(pyclustering_package)
    package = ccore.bsas_algorithm(pointer_data, c_size_t(amount), c_double(threshold), metric_pointer)

    result = package_extractor(package).extract()
    ccore.free_pyclustering_package(package)

    return result[0], result[1]